The need for EBW as a critical fabrication process in realising elements and assemblies for spacecraft and launch vehicle programmes due to the following unique requirements.
Titanium forgings have been joined by EBW t o form a rot or hub of 3000 mm in diameter for a new helicopter. The Ti - 6 AI - 4 V alloy parts of 55 mm and 255 mm thick are EB welded in one pass and joined in the areas of the hub. The hub and blade of the helicopter were formed by EBW since hub and blades could not be forged in one piece. EB welding is being extensively used to join Inconel 718 components together on the engines for the space shuttle.